Mercurial > cpython-lru_cache-weakref

annotate Modules/parsermodule.c @ 1573:eaaba2cafeeb legacy-trunk

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author Guido van Rossum <guido@python.org>
date Mon, 07 Mar 1994 12:05:46 +0000
parents 474823e5f7dc
children 1940892d2fe3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /***********************************************************
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2 Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
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3 Amsterdam, The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI not be used in advertising or publicity pertaining to
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13 distribution of the software without specific, written prior permission.
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14
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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22
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23 ******************************************************************/
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24
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25 #include "allobjects.h"
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26 #include "node.h"
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27 #include "token.h"
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28 #include "pythonrun.h"
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29 #include "graminit.h"
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30 #include "errcode.h"
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31
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32 object *
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33 node2tuple(n)
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34 node *n;
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35 {
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36 if (n == NULL) {
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37 INCREF(None);
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38 return None;
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39 }
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40 if (ISNONTERMINAL(TYPE(n))) {
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41 int i;
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42 object *v, *w;
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43 v = newtupleobject(1 + NCH(n));
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44 if (v == NULL)
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45 return v;
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46 w = newintobject(TYPE(n));
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47 if (w == NULL) {
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48 DECREF(v);
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49 return NULL;
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50 }
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51 settupleitem(v, 0, w);
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52 for (i = 0; i < NCH(n); i++) {
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53 w = node2tuple(CHILD(n, i));
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54 if (w == NULL) {
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55 DECREF(v);
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56 return NULL;
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57 }
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58 settupleitem(v, i+1, w);
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59 }
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60 return v;
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61 }
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62 else if (ISTERMINAL(TYPE(n))) {
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63 return mkvalue("(is)", TYPE(n), STR(n));
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64 }
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65 else {
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66 err_setstr(SystemError, "unrecognized parse tree node type");
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67 return NULL;
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68 }
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69 }
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70
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71 static object *
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72 parser_parsefile(self, args)
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73 object *self;
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74 object *args;
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75 {
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76 char *filename;
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77 FILE *fp;
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78 node *n = NULL;
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79 int err;
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80 object *res;
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81 if (!getargs(args, "s", &filename))
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82 return NULL;
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83 fp = fopen(filename, "r");
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84 if (fp == NULL) {
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85 err_errno(IOError);
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86 return NULL;
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87 }
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88 err = parse_file(fp, filename, file_input, &n);
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89 fclose(fp);
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90 if (err != E_DONE) {
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91 err_input(err);
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92 return NULL;
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93 }
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94 res = node2tuple(n);
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95 freetree(n);
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96 return res;
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97 }
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98
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99 static struct methodlist parser_methods[] = {
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100 {"parsefile", parser_parsefile},
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101 {0, 0} /* Sentinel */
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102 };
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103
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104 void
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105 initparser()
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106 {
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107 initmodule("parser", parser_methods);
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108 }